Add binary mask option?

[Jonseed]

I was trying to use this with Inpaint-CropAndStitch, and I kept getting the error: AssertionError: Batch size of images and masks must be the same. But I double-checked, and there was only 1 mask and 1 image outputting from canvas_tab. The thing that finally fixed it was using the Impact-Pack node ToBinaryMask to convert the mask from canvas_tab into a binary mask (only 0 or 255 values), and that did it. Inpaint-CropAndStitch needs to receive a binary mask, and the masks from canvas_tab have soft edges with values between 0 and 255. So I have to convert it to a binary mask (non-zero values are all set to 255). It would be nice to have a toggle inside canvas_tab to natively output binary masks for those nodes that must receive binary masks.